On Tue Jun 18, 2024 at 12:17 PM CEST, AngeloGioacchino Del Regno wrote: > The display IPs in MediaTek SoCs are *VERY* flexible and those support > being interconnected with different instances of DDP IPs (for example, > merge0 or merge1) and/or with different DDP IPs (for example, rdma can > be connected with either color, dpi, dsi, merge, etc), forming a full > Display Data Path that ends with an actual display. > > This series was born because of an issue that I've found while enabling > support for MT8195/MT8395 boards with DSI output as main display: the > current mtk_drm_route variations would not work as currently, the driver > hardcodes a display path for Chromebooks, which have a DisplayPort panel > with DSC support, instead of a DSI panel without DSC support. > > There are other reasons for which I wrote this series, and I find that > hardcoding those paths - when a HW path is clearly board-specific - is > highly suboptimal. Also, let's not forget about keeping this driver from > becoming a huge list of paths for each combination of SoC->board->disp > and... this and that. > > For more information, please look at the commit description for each of > the commits included in this series. > > This series is essential to enable support for the MT8195/MT8395 EVK, > Kontron i1200, Radxa NIO-12L and, mainly, for non-Chromebook boards > and Chromebooks to co-exist without conflicts. > > Besides, this is also a valid option for MT8188 Chromebooks which might > have different DSI-or-eDP displays depending on the model (as far as I > can see from the mtk_drm_route attempt for this SoC that is already > present in this driver). > > This series was tested on MT8195 Cherry Tomato and on MT8395 Radxa > NIO-12L with both hardcoded paths, OF graph support and partially > hardcoded paths, and pure OF graph support including pipelines that > require OVL_ADAPTOR support. > > AngeloGioacchino Del Regno (3): > dt-bindings: display: mediatek: Add OF graph support for board path > dt-bindings: arm: mediatek: mmsys: Add OF graph support for board path > drm/mediatek: Implement OF graphs support for display paths Thanks! Tested-by: Michael Walle <mwalle@xxxxxxxxxx> # on kontron-sbc-i1200 -michael
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